EP 2362241 A1 20110831 - Electromagnetic proximity detection Method and Unit
Title (en)
Electromagnetic proximity detection Method and Unit
Title (de)
Elektromagnetisches Nähenerkennungsverfahren und Gerät
Title (fr)
Procédé de détection de proximité électromagnétique et unité
Publication
Application
Priority
EP 10154738 A 20100225
Abstract (en)
An electromagnetic proximity detection method for a buried structure (5/10), in particular an underground conduit or wiring at a construction site, executed with a mobile detection device (1), by the steps of sensing an electromagnetic field (7/12) emitted from the structure (5/10) as an analog electrical signal and digitalizing the analog electrical signal as a digital signal, is presented. After or while filtering the analog and/or digital signal, a determining of the proximity of the buried structure by analysing the digital signal is executed, wherein the detection method can be alternatively executed in at least two of the following, in particular alternatively selectable, modes of detection: . Power-Mode of detection, .Radio-Mode of detection or .Active-Mode of detection. The method is characterized by an additional Switching-Mode of operation wherein a repeated sequential detection in at least two of the mentioned modes of detection is done by automatic subsequent alternating of the mode of detection with such a minimum rate of alternation that an area of detection (2) is coverable by the at least two modes of detection in a single execution of the detection method.
IPC 8 full level
G01V 3/15 (2006.01)
CPC (source: EP KR US)
Citation (applicant)
- US 4438401 A 19840320 - IWAMOTO YOSHINAO [JP], et al
- US 5194812 A 19930316 - YOKOI SHIN [JP]
- EP 0916613 A2 19990519 - SCHLAFHORST & CO W [DE]
- US 4600356 A 19860715 - BRIDGES JACK E [US], et al
- US 5592092 A 19970107 - MECHLER MARK V [US]
- US 6437726 B1 20020820 - PRICE ROBERT J [US]
- GB 2427473 A 20061227 - RADIODETECTION LTD [GB]
- US 7403012 B2 20080722 - WORSLEY ROBERT [GB], et al
Citation (search report)
- [XYI] US 4085360 A 19780418 - HOWELL MARK IAN
- [Y] US 2004189322 A1 20040930 - PEARSON RICHARD D [GB], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
EP 2362241 A1 20110831; AU 2011219827 A1 20120906; AU 2011219827 B2 20130516; CA 2791092 A1 20110901; CA 2791092 C 20151020; CN 102782525 A 20121114; CN 102782525 B 20141022; EP 2539743 A2 20130102; EP 2539743 B1 20200401; KR 101521507 B1 20150528; KR 20120136368 A 20121218; US 2013002256 A1 20130103; US 8791701 B2 20140729; WO 2011104314 A2 20110901; WO 2011104314 A3 20120126
DOCDB simple family (application)
EP 10154738 A 20100225; AU 2011219827 A 20110224; CA 2791092 A 20110224; CN 201180011116 A 20110224; EP 11708426 A 20110224; EP 2011052769 W 20110224; KR 20127024907 A 20110224; US 201113580939 A 20110224